/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.core.time.impl;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Date;
import java.util.Map;
import org.drools.core.WorkingMemory;
import org.drools.core.base.mvel.MVELObjectExpression;
import org.drools.core.common.AgendaItem;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.common.ScheduledAgendaItem;
import org.drools.core.reteoo.LeftTuple;
import org.drools.core.rule.ConditionalElement;
import org.drools.core.rule.Declaration;
import org.drools.core.spi.Activation;
import org.drools.core.time.Trigger;
import org.kie.api.runtime.Calendars;
import static org.drools.core.time.TimeUtils.evalDateExpression;
public class IntervalTimer extends BaseTimer
implements
Timer,
Externalizable {
private MVELObjectExpression startTime;
private MVELObjectExpression endTime;
private int repeatLimit;
private long delay;
private long period;
public IntervalTimer() {
}
public IntervalTimer(MVELObjectExpression startTime,
MVELObjectExpression endTime,
int repeatLimit,
long delay,
long period) {
this.startTime = startTime;
this.endTime = endTime;
this.repeatLimit = repeatLimit;
this.delay = delay;
this.period = period;
}
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject( startTime );
out.writeObject( endTime );
out.writeInt( repeatLimit );
out.writeLong( delay );
out.writeLong( period );
}
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
this.startTime = (MVELObjectExpression) in.readObject();
this.endTime = (MVELObjectExpression) in.readObject();
this.repeatLimit = in.readInt();
this.delay = in.readLong();
this.period = in.readLong();
}
public Declaration[] getStartDeclarations() {
return this.startTime != null ? this.startTime.getMVELCompilationUnit().getPreviousDeclarations() : null;
}
public Declaration[] getEndDeclarations() {
return this.endTime != null ? this.endTime.getMVELCompilationUnit().getPreviousDeclarations() : null;
}
public Declaration[][] getTimerDeclarations(Map<String, Declaration> outerDeclrs) {
return new Declaration[][] { sortDeclarations(outerDeclrs, getStartDeclarations()),
sortDeclarations(outerDeclrs, getEndDeclarations()) };
}
public long getDelay() {
return delay;
}
public long getPeriod() {
return period;
}
public Trigger createTrigger( Activation item, InternalWorkingMemory wm ) {
long timestamp = wm.getTimerService().getCurrentTime();
String[] calendarNames = item.getRule().getCalendars();
Calendars calendars = wm.getCalendars();
Declaration[][] timerDeclrs = ((AgendaItem)item).getTerminalNode().getTimerDeclarations();
ScheduledAgendaItem schItem = ( ScheduledAgendaItem ) item;
DefaultJobHandle jh = null;
if ( schItem.getJobHandle() != null ) {
jh = ( DefaultJobHandle) schItem.getJobHandle();
}
return createTrigger( timestamp, item.getTuple(), jh, calendarNames, calendars, timerDeclrs, wm );
}
public Trigger createTrigger(long timestamp,
LeftTuple leftTuple,
DefaultJobHandle jh,
String[] calendarNames,
Calendars calendars,
Declaration[][] declrs,
InternalWorkingMemory wm) {
long timeSinceLastFire = 0;
Declaration[] startDeclarations = declrs[0];
Declaration[] endDeclarations = declrs[1];
if ( jh != null ) {
IntervalTrigger preTrig = (IntervalTrigger) jh.getTimerJobInstance().getTrigger();
if (preTrig.getLastFireTime() != null) {
timeSinceLastFire = timestamp - preTrig.getLastFireTime().getTime();
}
}
// if it is already fired calculate the new delay using the period instead of the delay
long newDelay = timeSinceLastFire > 0 ? period - timeSinceLastFire : delay;
if (newDelay < 0) {
newDelay = 0;
}
return new IntervalTrigger( timestamp,
evalDateExpression( this.startTime, leftTuple, startDeclarations, wm ),
evalDateExpression( this.endTime, leftTuple, startDeclarations, wm ),
this.repeatLimit,
newDelay,
this.period,
calendarNames,
calendars );
}
public Trigger createTrigger(long timestamp,
String[] calendarNames,
Calendars calendars) {
return new IntervalTrigger( timestamp,
null, // this.startTime,
null, // this.endTime,
this.repeatLimit,
this.delay,
this.period,
calendarNames,
calendars );
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (int) (delay ^ (delay >>> 32));
result = prime * result + ((endTime == null) ? 0 : endTime.hashCode());
result = prime * result + (int) (period ^ (period >>> 32));
result = prime * result + repeatLimit;
result = prime * result + ((startTime == null) ? 0 : startTime.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if ( this == obj ) return true;
if ( obj == null ) return false;
if ( getClass() != obj.getClass() ) return false;
IntervalTimer other = (IntervalTimer) obj;
if ( delay != other.delay ) return false;
if ( repeatLimit != other.repeatLimit ) return false;
if ( endTime == null ) {
if ( other.endTime != null ) return false;
} else if ( !endTime.equals( other.endTime ) ) return false;
if ( period != other.period ) return false;
if ( startTime == null ) {
if ( other.startTime != null ) return false;
} else if ( !startTime.equals( other.startTime ) ) return false;
return true;
}
@Override
public ConditionalElement clone() {
return new IntervalTimer(startTime,
endTime,
repeatLimit,
delay,
period);
}
}